Georg schneider



(No Model.)

G. SCHNEIDER.

FABRIC FOR DRIVING BELTS.

No. 378,151. Patented Feb. 21, 1888.

N. PETERS. mnmuaho ncn Wukington D. c

UNITED STATES PATENT @rrrcs.

GEORG SCHNEIDER, OF COLOGNE, GERMANY.

FABRlC FOR D RlVlNG-BELTS.

SPECIFICATION forming part of Letters Patent No. 378,151, dated February 21, 1888.

Application liled November 16, 1885. Serial X0. 18219603. (No specimens.) Patented in Germany June 12, 1884, No. 29,737.

To aZZ whom it may concern;

Be it known that I, GEOR'} SCHNEIDER, manufacturer, (of the firm of G. SCHNEIDER W. Sol-mg) a citizen of the German Empire, residing at Cologne, Germany, have invented a new and useful improvement in Fabrics for Driving-Belts, (for which I have obtained a patent in Germany, No. 29,737, bearing date June 12, 1884,) of which the following is a specification.

In the accompanying drawings, Figure l is a top view of an ordinary sail-cloth. Fig. 2 is a section of Fig. 1. Fig. 3 is a top view of my hempen fabric for driving-belts. Fig. 4 is a section of Fig. Fig. 5 is a View of a warpthread, the warp-thread being composed of three separate strands of the same material, the strands being turned (twined) round each other.

It is well known that driving-belts when in use have to resist strain in one direction onlya, lengthwise, whereas crosswise the utmost flexibility is required. It follows from the above that it is necessary in the manufacture of textile fabrics for use as belting to closely observe this requirement. Previous attempts made in this direction have been unsuccessful, although in some cases, with a View of increasing the strength of the belts lengthwise, wlres have been interwoven in the warp of the fabric; but this likewise failed, because the different elasticity of the wires and of the threads caused an objectionable and unequal expansion of the whole fabric lengthwise. Besides, the threads wore out in rubbing against the wires and the wires reduced the flexibility of the belt. Belting has hitherto also been made of simple sail-cloth, which is also used for other purposes, such as for tents, cart hoods, &c. The peculiarity of such fabric, whereof the kind of weaving is represented in Fig. 1, is that it is of equal strength in the directions of the warps and of the wefts. It thus fulfills the last-mentioned purposes perfectly; but it is not quite sosuitable for the manufacture of belting, the nature and special requirements of which are not taken into consideration at all. Ordinary saihcloth when submitted to a heavy strain stretches in the direction of its length beyond the desired extent, this being permitted by the straightening out of the warp-threads, which in the fabric form an undulating line, as represented in Fig. 2. The weft, being of the same size as the warp, has a strength and hardness which exceed the requirements, and thus the flexibility of the belt is impaired.

My invention has for its object to produce cloth, more especially intended for belting, which will combine great strength with the lowest but still uniform expansion, and which will offer the greatest extent of flexibility. To this end I employ warp-threads of hempin usual manner, wet spun, (i. 6., the matter passing through hot water before the spinning) twined and tightly beamed, and untwined weft of very soft hackled hemp loosely dry spun (i. 6., the matter not passing through hot water before the spinning) and of a much smaller size, and I weave the same into a three-leaved twill, Fig. 3. It is to be understood that untwined thread is a singlespun thread. Twined threads, on the contrary, are formed by means ofa plural number (two, three, four, five, &c.) of untwined threads being twisted (turned) altogether round about their axis of length. Owing to the twill-weaving the large undulations of the warp-thread, as in 2, are avoided, and such undulations as exist are much farther apart, (see Fig. 4,) and owing also to the tightness of the beaming the faculty of expansion is reduced to a minimum, while by wet spinnin g and twining the warp-thread the strength is considerably increased. Therefore while the fabric thus fulfills the requirements of a beltlength wise the soft weft, which has no other purpose than that of holding the warp-threads together and filling up the fabric, contributes in the highest degree to render the belting flexible, thus adding another indispensable quality to good belting.

To the best of my knowledge cloth made as above describedi. 6., cloth characterized by very strong warp-threads of hemp wet spun and twined in usual manner, tightly beamed and interwoven into a three-leaved twill with very flexible weft-threads of soft hackled hemp loosely dry spun, untwined, and of amuch smaller size-has not been manufactured hitherto, and such a fabric is specially applicable for making belting.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is-

A helnpen fabric for nsein the manufacture In testimony whereof I have signed this of driving-belts, composed of twined tightlyspecification in the presence of two subscribspun warp-threads and loose untwined soft ing Witnesses. weft-threads of hackled hemp, finer than the GEORG SCHNEIDER. 5 said warp-threads, the Warp-threads being in- 'Witnesses:

terwoven with the Weft-threads in a three 0.. STAMERS GUISE, leaved twill, as described. WV. H. SOHULZ. I

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